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| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2023-01-08 22:13:22 +0100 |
|---|---|---|
| committer | Kalle Valo <kvalo@kernel.org> | 2023-01-16 18:27:43 +0200 |
| commit | 8a1e2fd8e2da5c8b8c438e20ebffef6881cc9ab8 (patch) | |
| tree | d83af21810a313da7b06236a3d6794a7fdf39397 /kernel | |
| parent | 2a86aa9a1892d60ef2e3f310f5b42b8b05546d65 (diff) | |
| download | linux-8a1e2fd8e2da5c8b8c438e20ebffef6881cc9ab8.tar.gz linux-8a1e2fd8e2da5c8b8c438e20ebffef6881cc9ab8.tar.bz2 linux-8a1e2fd8e2da5c8b8c438e20ebffef6881cc9ab8.zip | |
wifi: rtw88: Move register access from rtw_bf_assoc() outside the RCU
USB and (upcoming) SDIO support may sleep in the read/write handlers.
Shrink the RCU critical section so it only cover the call to
ieee80211_find_sta() and finding the ic_vht_cap/vht_cap based on the
found station. This moves the chip's BFEE configuration outside the
rcu_read_lock section and thus prevent "scheduling while atomic" or
"Voluntary context switch within RCU read-side critical section!"
warnings when accessing the registers using an SDIO card (which is
where this issue has been spotted in the real world - but it also
affects USB cards).
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Tested-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230108211324.442823-2-martin.blumenstingl@googlemail.com
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions